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Process control transmitter with adaptive analog-to-digital converter

  • US 5,909,188 A
  • Filed: 02/24/1997
  • Issued: 06/01/1999
  • Est. Priority Date: 02/24/1997
  • Status: Expired due to Term
First Claim
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1. A transmitter for use in a process control system, comprising:

  • a sensor adapted to couple to a process and provide a sensor output related to a parameter of the process;

    a modulator coupled to the sensor output responsively providing a digital bit stream output representative of the sensor output;

    a filter decimating the bit stream output and providing a plurality of current outputs with differing resolutions or bandwidths; and

    selection circuitry coupled to the filter which automatically selects one of the plurality of current outputs and responsively provides an output representative of the parameter.

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